The following information shows the result of the orbit fit based on Gary Bernstein's method. Most of the information should be self-explanatory. Take special note that while the original Bernstein software works with barycentric coordinates, we convert these results into a heliocentric coordinate system.
# Object: 17BG241
# Created Mon Apr 28 01:11:04 2025
# Orbit generated from Bernstein formalism
# Fitting 26 observations of 26
# Arc: 0.90y
# First observation: 2016/04/02
# Last observation: 2017/02/23
Preliminary a, adot, b, bdot, g, gdot:
-0.000016 0.018908 0.000000 0.000453 0.021301 0.000000
# Chi-squared of fit: 22.96 DOF: 46 RMS: 0.17
# Min/Max residuals: -0.53 0.46
# Exact a, adot, b, bdot, g, gdot:
1.417859E-05 1.890768E-02 6.537256E-07 4.569555E-04 2.157907E-02 1.188869E-04
# Covariance matrix:
1.4819E-13 1.6350E-12 3.4512E-15 1.7914E-14 7.7589E-13 7.5780E-11
1.6350E-12 2.6366E-10 3.5192E-13 2.3395E-12 9.1984E-11 1.0491E-08
3.4512E-15 3.5192E-13 9.7529E-14 -1.2636E-13 1.2740E-13 1.4177E-11
1.7914E-14 2.3395E-12 -1.2636E-13 4.4190E-13 8.2654E-13 9.3549E-11
7.7589E-13 9.1984E-11 1.2740E-13 8.2654E-13 3.2787E-11 3.6880E-09
7.5780E-11 1.0491E-08 1.4177E-11 9.3549E-11 3.6880E-09 4.1887E-07
# lat0 lon0 xBary yBary zBary JD0
2.351644 -175.026261 -0.135185 0.040614 -0.985557 2457480.890769
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 172.23570 +/- 24.251
Argument of Peri: 245.90556 +/- 24.288
Long of Asc Node: 125.97412 +/- 0.041
Inclination: 2.68100 +/- 0.001
Eccentricity: 0.07418468 +/- 0.0030
Semi-Major Axis: 44.08637762 +/- 0.0412
Time of Perihelion: 2513245.9958 +/- 7202.3
Perihelion: 40.81584374 +/- 0.1389
Aphelion: 47.35691150 +/- 0.1407
Period (y) 292.7284 +/- 0.41
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -47.10250342 +/- 0.0122
Ecliptic Y -4.23725388 +/- 0.0011
Ecliptic Z 1.90154468 +/- 0.0005
Ecliptic XDOT 0.00019545 +/- 0.0001
Ecliptic YDOT -0.00239797 +/- 0.0000
Ecliptic ZDOT 0.00005855 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 47.33092035 +/- 0.0122
Geocenter to KBO 46.34120884 +/- 0.0123
# Hcoef: 8.57
The following table shows the complete astrometric record for 17BG241. The first three columns show the date of observation. The next six columns are RA and DEC. The next column (when provided) is the observed magnitude and filter. The next column is the object name (17BG241) followed by the observatory code and reference code for the source of the astrometry.
2016 04 02.38998 12 21 59.37 +00 10 57.7 25.1i 17BG241 T09 C~8HK0 2016 04 02.41732 12 21 59.26 +00 10 58.5 24.9i 17BG241 T09 C~8HK0 2016 04 02.44189 12 21 59.17 +00 10 59.2 24.8i 17BG241 T09 C~8HK0 2016 04 02.46904 12 21 59.05 +00 10 59.8 24.8i 17BG241 T09 C~8HK0 2016 04 02.50172 12 21 58.92 +00 11 00.7 24.7i 17BG241 T09 C~8HK0 2016 04 02.52599 12 21 58.83 +00 11 01.4 24.7i 17BG241 T09 C~8HK0 2016 04 04.36800 12 21 51.48 +00 11 48.2 26.5g 17BG241 T09 C~8HK0 2016 04 04.38940 12 21 51.39 +00 11 48.9 26.6g 17BG241 T09 C~8HK0 2016 04 04.41295 12 21 51.29 +00 11 49.9 26.6g 17BG241 T09 C~8HK0 2016 04 04.41508 12 21 51.30 +00 11 49.6 26.5g 17BG241 T09 C~8HK0 2016 04 04.41948 12 21 51.28 +00 11 49.9 26.4g 17BG241 T09 C~8HK0 2016 06 04.25539 12 18 59.94 +00 28 34.3 25.1z 17BG241 T09 C~8HK0 2016 06 04.28926 12 18 59.85 +00 28 34.3 24.6z 17BG241 T09 C~8HK0 2016 06 04.30544 12 18 59.82 +00 28 34.1 24.9z 17BG241 T09 C~8HK0 2016 06 04.32707 12 18 59.83 +00 28 34.4 24.6z 17BG241 T09 C~8HK0 2016 06 05.31150 12 18 58.85 +00 28 38.1 26.0r 17BG241 T09 C~8HK0 2016 06 05.31720 12 18 58.83 +00 28 38.3 25.1r 17BG241 T09 C~8HK0 2016 06 05.35612 12 18 58.80 +00 28 38.5 25.4r 17BG241 T09 C~8HK0 2017 01 28.59538 12 29 32.88 -00 38 01.5 24.1z 17BG241 T09 C~86um 2017 01 28.60345 12 29 32.85 -00 38 01.5 25.0z 17BG241 T09 C~86um 2017 01 28.61148 12 29 32.83 -00 38 01.1 24.7z 17BG241 T09 C~86um 2017 01 28.61691 12 29 32.82 -00 38 01.1 25.0z 17BG241 T09 C~86um 2017 01 28.62228 12 29 32.82 -00 38 01.0 24.2z 17BG241 T09 C~86um 2017 02 23.53583 12 28 26.69 -00 29 44.7 25.6r 17BG241 T09 C~86um 2017 02 23.56346 12 28 26.62 -00 29 44.2 25.7r 17BG241 T09 C~86um 2017 02 23.60592 12 28 26.47 -00 29 43.2 25.5r 17BG241 T09 C~86um
The following table shows the residuals to the orbit fit. The first coumn is the point number. The second column is the time, in years, measured from the first observation. The third and fifth columns are the regularized positions used in the orbit fit. The fourth and sixth columns are the residuals, in arc seconds, for RA and Dec respectively.
1 0.0000 0.00 -0.07 0.00 -0.07
2 0.0001 -1.83 -0.08 0.08 0.03
3 0.0001 -3.35 0.03 0.19 0.15
4 0.0002 -5.24 -0.06 0.03 0.00
5 0.0003 -7.39 -0.04 0.08 0.08
6 0.0004 -8.90 0.05 0.19 0.20
7 0.0054 -128.67 0.11 -0.53 -0.26
8 0.0055 -130.19 0.00 -0.43 -0.13
9 0.0055 -131.96 -0.22 -0.10 0.21
10 0.0055 -131.71 0.18 -0.32 -0.01
11 0.0056 -132.10 0.08 -0.16 0.15
12 0.1721 -2889.96 0.46 -96.37 0.22
13 0.1722 -2891.20 -0.21 -96.91 -0.22
14 0.1723 -2891.53 -0.27 -97.27 -0.53
15 0.1723 -2891.51 0.11 -96.93 -0.13
16 0.1750 -2906.48 0.12 -99.36 -0.04
17 0.1750 -2906.83 -0.14 -99.30 0.04
18 0.1751 -2907.33 -0.03 -99.29 0.16
19 0.8247 7413.55 0.23 -3.04 0.14
20 0.8247 7413.14 0.06 -3.22 -0.06
21 0.8247 7412.70 -0.13 -2.97 0.17
22 0.8247 7412.56 -0.11 -3.03 0.10
23 0.8247 7412.52 0.02 -2.93 0.18
24 0.8957 6303.94 -0.23 59.81 -0.12
25 0.8958 6302.77 0.14 59.85 -0.12
26 0.8959 6300.31 0.03 59.88 -0.15
The following table comes from a 10My integration of the orbit of the object. Three columns are shown. The first column is the result of integrating the nominal orbit. The other two columns are based on clones of the nominal orbit that are +/- 3 sigma from the nominal orbit. If all three types agree then the classificiation is deemed secure. The basis for these calculations is described in more detail in AJ, 129, 1117 (2005). Any use made of these calculations should refer to and credit this publication and the Deep Ecliptic Survey Team.
17BG241 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.668 44.191 43.616 ecceobj 0.085 0.123 0.088 incobj 2.685 2.687 2.685 qmin 39.002 37.596 38.633 qmax 49.024 51.524 49.367 amean 43.866 44.376 43.833 amin 43.516 43.999 43.473 amax 44.249 44.787 44.229 emean 0.090 0.133 0.094 emin 0.069 0.113 0.070 emax 0.108 0.151 0.116 imean 2.143 2.267 2.119 imin 1.067 1.086 1.054 imax 2.963 3.183 2.997 excite_mean 0.098 0.139 0.102 fracstop 1.000 1.000 1.000 cjmean 3.088 3.082 3.087 libcent 0 -180.0 -180.0 -180.0 libamp 0 -180.0 -180.0 -180.0 libcent 1 -180.0 -180.0 -180.0 libamp 1 -180.0 -180.0 -180.0 libcent 2 -180.0 -180.0 -180.0 libamp 2 -180.0 -180.0 -180.0 libcent 3 -180.0 -180.0 -180.0 libamp 3 -180.0 -180.0 -180.0 libcent 4 -180.0 -180.0 -180.0 libamp 4 -180.0 -180.0 -180.0 kozaimean 181.4 180.6 187.6 kozaiamp 180.0 179.9 179.9